Multiple mobile excitons manifested as sidebands in quasi-one-dimensional metallic TaSe3

doi:10.1038/s41563-022-01201-9

	Multiple mobile excitons manifested as sidebands in quasi-one-dimensional metallic TaSe3
	Ma, Junzhang 3,15,16; Nie, Simin 4; Gui, Xin 5; Naamneh, Muntaser 16; Jandke, Jasmin 16; Xi, Chuanying 6; Zhang, Jinglei 6; Shang, Tian 7; Xiong, Yimin 6; Kapon, Itzik 1
刊名	NATURE MATERIALS
	2022-02-21
ISSN号	1476-1122
DOI	10.1038/s41563-022-01201-9
通讯作者	Ma, Junzhang(junzhama@cityu.edu.hk) ; Mueller, Markus(markus.mueller@psi.ch) ; Shi, Ming(ming.shi@psi.ch)
英文摘要	Charge neutrality and their expected itinerant nature makes excitons potential transmitters of information. However, exciton mobility remains inaccessible to traditional optical experiments that only create and detect excitons with negligible momentum. Here, using angle-resolved photoemission spectroscopy, we detect dispersing excitons in the quasi-one-dimensional metallic trichalcogenide, TaSe3. The low density of conduction electrons and the low dimensionality in TaSe3 combined with a polaronic renormalization of the conduction band and the poorly screened interaction between these polarons and photo-induced valence holes leads to various excitonic bound states that we interpret as intrachain and interchain excitons, and possibly trions. The thresholds for the formation of a photo-hole together with an exciton appear as side valence bands with dispersions nearly parallel to the main valence band, but shifted to lower excitation energies. The energy separation between side and main valence bands can be controlled by surface doping, enabling the tuning of certain exciton properties. Mobile excitons in metals have been elusive, as screening usually suppresses their formation. Here, the authors demonstrate such mobile bound states in quasi-one-dimensional metallic TaSe3, taking advantage of its low dimensionality and carrier density.
资助项目	Sino-Swiss Science and Technology Cooperation[IZLCZ2-170075] ; Swiss National Science Foundation[200021_188413] ; Swiss National Science Foundation[200021_182695] ; Swiss National Science Foundation[200021_166271] ; Swiss National Science Foundation[200021_159678] ; NCCR MARVEL - Swiss National Science Foundation ; European Union[701647] ; City University of Hong Kong[9610489] ; National Natural Science Foundation of China[12104379] ; Shenzhen Research Institute, City University of Hong Kong ; Deutsche Forschungsgemeinschaft[SE 2558/2] ; Excellence Program of Hefei Science Center CAS[2021HSC-UE011] ; Beckman Young Investigator Programme - Arnold and Mabel Beckman Foundation ; US NSF[DMR-1944965] ; US Department of Energy Division of Basic Energy Sciences[DG-FG02-98ER45706]
WOS关键词	CHARGE-DENSITY-WAVE ; TRANSITION ; SUPERCONDUCTIVITY
WOS研究方向	Chemistry ; Materials Science ; Physics
语种	英语
出版者	NATURE PORTFOLIO
WOS记录号	WOS:000758972100001
资助机构	Sino-Swiss Science and Technology Cooperation ; Swiss National Science Foundation ; NCCR MARVEL - Swiss National Science Foundation ; European Union ; City University of Hong Kong ; National Natural Science Foundation of China ; Shenzhen Research Institute, City University of Hong Kong ; Deutsche Forschungsgemeinschaft ; Excellence Program of Hefei Science Center CAS ; Beckman Young Investigator Programme - Arnold and Mabel Beckman Foundation ; US NSF ; US Department of Energy Division of Basic Energy Sciences
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/127784]
专题	中国科学院合肥物质科学研究院
通讯作者	Ma, Junzhang; Mueller, Markus; Shi, Ming
作者单位	1.Univ Geneva, Dept Quantum Matter Phys, Geneva, Switzerland 2.Paul Scherrer Inst, Villigen, Switzerland 3.City Univ Hong Kong, Shenzhen Res Inst, Shenzhen, Peoples R China 4.Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA 5.Princeton Univ, Dept Chem, Princeton, NJ 08544 USA 6.Chinese Acad Sci, Anhui Prov Key Lab Condensed Matter Phys Extreme, High Magnet Field Lab, HFIPS, Hefei, Peoples R China 7.East China Normal Univ, Sch Phys & Elect Sci, Key Lab Polar Mat & Devices, Shanghai, Peoples R China 8.Ecole Polytech Fed Lausanne EPFL, Inst Phys, Lausanne, Switzerland 9.Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing, Peoples R China 10.Chinese Acad Sci, Inst Phys, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Ma, Junzhang,Nie, Simin,Gui, Xin,et al. Multiple mobile excitons manifested as sidebands in quasi-one-dimensional metallic TaSe3[J]. NATURE MATERIALS,2022.
APA	Ma, Junzhang.,Nie, Simin.,Gui, Xin.,Naamneh, Muntaser.,Jandke, Jasmin.,...&Shi, Ming.(2022).Multiple mobile excitons manifested as sidebands in quasi-one-dimensional metallic TaSe3.NATURE MATERIALS.
MLA	Ma, Junzhang,et al."Multiple mobile excitons manifested as sidebands in quasi-one-dimensional metallic TaSe3".NATURE MATERIALS (2022).